【摘要】 Ad Hoc技术具有小范围即兴组网特点,又适合对等节点间的通信,有利于组建一个操作简单、组网灵活、价格低廉且范围较小的家庭网络.选播协议作为IP网络的一种新的通信模型,在平衡负载、减少网络流量、降低网络延时方面起到重要的作用.将IPv6中采用的选播协议模型引入到Ad Hoc家庭网中,设计了基于DSR的选播路由协议A-DSR.由于选播组中每一服务器节点在路由处理方面有相同的优先权,路由选择时可以动态地选择最佳的服务节点,实现了动态平衡.从A-DSR和DSR的仿真模拟及性能比较看,A-DSR协议能不断获取对整个选播组的路由信息来更新路由缓存,即使是在节点移动性高或者信源节点数变大时,它的性能曲线能保持平稳,而DSR协议不能动态地选择服务节点,性能曲线起伏较大,A-DSR协议明显提高了原协议的性能,将对优化网络结构、有效改善网络性能起到重要意义.更多还原

【Abstract】 Ad Hoc techniques allow quick construction of small scale networks that can effectively communicate between peer-to-peer nodes,so they are ideal for the construction of simple,flexible,and cheap family networks of relatively small scope.As a new kind of communication model,the Anycast protocol plays an important role in balancing network load,reducing network traffic and network-induced delay.The Anycast routing protocol A-DSR was designed by introducing DSR in IPv6 to the Anycast protocol model for Ad Hoc family networks.The performance of A-DSR and DSR was compared via computer simulations,and it was shown that A-DSR improves the performance of the original protocol and so better meets the requirement of Ad Hoc networks.更多还原